Effect of ozone on pyridine nucleotide reduction and phosphorylation of Euglena gracilis
Fumigation of a Euglena gracilis suspension for one hour with 0.80 ppm ozone in the absence of light does not affect the concentration of reduced pyridine nucleotide (NADH) in the cells. Oxidative phosphorylation is increased by 9.4%, following fumigation with 0.80 ppm ozone; its efficiency (P/O ratio) remains unchanged. Exposure of Euglena cells to ozone (0.80 ppm) in the presence of light diminishes the rate of NADH formation by 9% to 12% when compared with samples treated with pure air. Photosynthetic phosphorylation of Euglena samples treated with 0.80 ppm ozone is diminished by 3.6%. Data that were obtained following fumigation with ozone in the dark suggest the formation of modified cell structures. Results obtained following fumigation with ozone in the presence of light explain the inhibitory effect of ozone on the rate of photosynthesis of E. gracilis in more detail. 11 references, 2 figures, 1 table.
- Research Organization:
- Universite de Montreal, Quebec
- OSTI ID:
- 5651053
- Journal Information:
- Arch. Environ. Health; (United States), Journal Name: Arch. Environ. Health; (United States) Journal Issue: 6 Vol. 18; ISSN AEHLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ALGAE
BIOLOGICAL EFFECTS
CHEMICAL REACTIONS
COENZYMES
EFFICIENCY
ELECTROMAGNETIC RADIATION
EUGLENA
INHIBITION
MASTIGOPHORA
MICROORGANISMS
MORPHOLOGICAL CHANGES
NADH2
NUCLEOTIDES
ORGANIC COMPOUNDS
OZONE
PHOSPHORYLATION
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PLANTS
RADIATIONS
STIMULATION
SYNTHESIS
ULTRASTRUCTURAL CHANGES
UNICELLULAR ALGAE
VISIBLE RADIATION